5651671 has 4 divisors (see below), whose sum is σ = 5731344. Its totient is φ = 5572000.

The previous prime is 5651623. The next prime is 5651707. The reversal of 5651671 is 1761565.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5651671 - 2¹³ = 5643479 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5651621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39730 + ... + 39871.

It is an arithmetic number, because the mean of its divisors is an integer number (1432836).

Almost surely, 2^5651671 is an apocalyptic number.

5651671 is a deficient number, since it is larger than the sum of its proper divisors (79673).

5651671 is an equidigital number, since it uses as much as digits as its factorization.

5651671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79672.

The product of its digits is 6300, while the sum is 31.

The square root of 5651671 is about 2377.3243363075. The cubic root of 5651671 is about 178.1253062886.

The spelling of 5651671 in words is "five million, six hundred fifty-one thousand, six hundred seventy-one".